The E-Coli mystery is solved. Epidemiologists at Oregon Public Health confirm that deer roaming through fields at a Strawberry Farm in Washington County were the source of an E. coli outbreak that sickened 15 people in Oregon and killed one. The scientists say deer droppings sampled from the farm contained two different strains of E-Coli, including the one that made people ill in Multnomah, Washington Clackamas, Yamhill and Clatsop counties. It's not known how many deer in Oregon carry E-Coli.